Thank you for playing and for the kind words!
To unlock the other two endings (Bad and Gray), you do need to follow the "lie" route when you reach the crucial choice of whether to tell Taylor the truth or lie to him about the nighttime events.
Also, as a quick tip: if you go into the game's settings, you can turn on the ending hints feature. It essentially acts as a built-in walkthrough and will help guide you toward the exact endings you are missing.